.page-about {
  --about-line: rgba(198, 161, 91, 0.45);
  background: var(--ivory);
  color: var(--graphite);
  font-family: var(--font-body);
}

.page-about img {
  display: block;
  max-width: 100%;
  height: auto;
}

.page-about a:focus-visible {
  outline: 2px solid var(--gold);
  outline-offset: 3px;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  background: var(--indigo-900);
  color: var(--ivory);
  padding: clamp(22px, 4vw, 40px) 0 clamp(30px, 5vw, 58px);
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image: repeating-linear-gradient(
    45deg,
    rgba(198, 161, 91, 0.07) 0 1px,
    transparent 1px 24px
  );
  pointer-events: none;
}

.page-about .about-hero > .container {
  position: relative;
  z-index: 1;
}

.page-about .about-crumb {
  display: flex;
  align-items: center;
  gap: 0.5em;
  flex-wrap: wrap;
  margin: 0 0 clamp(18px, 3vw, 32px);
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  color: rgba(246, 241, 230, 0.62);
}

.page-about .about-crumb a {
  color: var(--gold-light);
  text-decoration: none;
}

.page-about .about-crumb a:hover {
  color: var(--gold);
}

.page-about .about-hero__grid {
  display: grid;
  gap: clamp(22px, 4vw, 48px);
}

.page-about .about-eyebrow {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  margin: 0 0 1rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  color: var(--gold);
  text-transform: uppercase;
}

.page-about .about-eyebrow__no {
  border: 1px solid var(--about-line);
  padding: 0.2rem 0.5rem;
}

.page-about .about-hero h1 {
  margin: 0 0 1.1rem;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.85rem, 4.2vw, 2.95rem);
  line-height: 1.3;
  letter-spacing: 0.01em;
  color: var(--ivory);
}

.page-about .about-hero__text {
  max-width: 54ch;
  margin: 0 0 1.25rem;
  font-size: 0.97rem;
  line-height: 1.9;
  color: rgba(246, 241, 230, 0.8);
}

.page-about .about-hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 0;
}

.page-about .about-hero__figure {
  margin: 0;
  border: 1px solid var(--about-line);
  background: var(--indigo-800);
}

.page-about .about-hero__figure img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.page-about .about-index {
  margin-top: clamp(26px, 4vw, 46px);
  padding-top: 18px;
  border-top: 1px solid var(--about-line);
}

.page-about .about-index__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0 1rem;
}

.page-about .about-index__list a {
  display: flex;
  align-items: baseline;
  gap: 0.5rem;
  padding: 0.55rem 0;
  font-size: 0.86rem;
  color: rgba(246, 241, 230, 0.82);
  text-decoration: none;
  transition: color 180ms ease;
}

.page-about .about-index__list a:hover {
  color: var(--gold-light);
}

.page-about .about-index__no {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  color: var(--gold);
}

/* ---------- 区块骨架 ---------- */
.page-about .about-section {
  padding: clamp(38px, 6vw, 80px) 0;
}

.page-about .about-section--ivory {
  background: var(--ivory);
}

.page-about .about-section--paper {
  background: var(--paper);
}

.page-about .about-section--dark {
  background: var(--indigo-800);
  color: var(--ivory);
}

.page-about .about-section--indigo {
  background: var(--indigo-900);
  color: var(--ivory);
}

.page-about .about-marker {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: clamp(20px, 3.4vw, 36px);
}

.page-about .about-marker::after {
  content: "";
  flex: 1 1 auto;
  height: 1px;
  min-width: 24px;
  background: linear-gradient(90deg, var(--about-line), transparent);
}

.page-about .about-marker__no {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.14em;
  color: var(--gold);
}

.page-about .about-h2 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.28rem, 2.6vw, 1.75rem);
  line-height: 1.45;
  color: var(--indigo-900);
}

.page-about .about-section--dark .about-h2,
.page-about .about-section--indigo .about-h2 {
  color: var(--ivory);
}

.page-about .about-lede {
  max-width: 62ch;
  margin: 0 0 clamp(20px, 3vw, 32px);
  font-size: 0.96rem;
  line-height: 1.9;
  color: var(--graphite);
}

.page-about .about-section--dark .about-lede,
.page-about .about-section--indigo .about-lede {
  color: rgba(246, 241, 230, 0.78);
}

/* ---------- 时间带 ---------- */
.page-about .timeline {
  position: relative;
  list-style: none;
  margin: 0;
  padding: 0 0 0 30px;
}

.page-about .timeline::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.5rem;
  bottom: 0.6rem;
  width: 1px;
  background: linear-gradient(180deg, var(--gold), rgba(198, 161, 91, 0.12));
}

.page-about .timeline__item {
  position: relative;
  max-width: 68ch;
  padding-bottom: clamp(26px, 4vw, 46px);
}

.page-about .timeline__item:last-child {
  padding-bottom: 0;
}

.page-about .timeline__item::before {
  content: "";
  position: absolute;
  left: -34px;
  top: 0.75rem;
  width: 9px;
  height: 9px;
  background: var(--gold);
  transform: rotate(45deg);
  box-shadow: 0 0 0 3px rgba(198, 161, 91, 0.16);
}

.page-about .timeline__year {
  margin: 0 0 0.45rem;
  font-family: var(--font-mono);
  font-size: clamp(1.75rem, 4vw, 3rem);
  line-height: 1;
  letter-spacing: 0.04em;
  color: var(--indigo-700);
}

.page-about .timeline__title {
  margin: 0 0 0.5rem;
  font-family: var(--font-display);
  font-size: 1.1rem;
  line-height: 1.5;
  color: var(--indigo-900);
}

.page-about .timeline__text {
  margin: 0;
  font-size: 0.95rem;
  line-height: 1.9;
  color: var(--graphite);
}

.page-about .timeline__key {
  display: inline-block;
  margin: 0.7rem 0 0;
  padding-left: 0.6rem;
  border-left: 2px solid var(--hairline);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  color: var(--indigo-500);
  transition: color 180ms ease, border-color 180ms ease;
}

.page-about .timeline__item:hover .timeline__key,
.page-about .timeline__item:focus-within .timeline__key {
  color: var(--gold);
  border-color: var(--gold);
}

.page-about .timeline__item--figure {
  max-width: none;
  padding-bottom: clamp(26px, 4vw, 46px);
}

.page-about .timeline__item--figure .figure-frame {
  border: 1px solid var(--hairline);
  background: var(--paper);
}

.page-about .timeline__item--figure .figure-frame__caption {
  font-size: 0.78rem;
  line-height: 1.7;
  color: var(--indigo-500);
}

/* ---------- 做事方式 ---------- */
.page-about .principles {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0;
}

.page-about .principles__item {
  padding: 18px 0 18px 18px;
  border-left: 1px solid rgba(198, 161, 91, 0.35);
}

.page-about .principles__no {
  margin: 0 0 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.12em;
  color: var(--gold);
}

.page-about .principles__title {
  margin: 0 0 0.5rem;
  font-family: var(--font-display);
  font-size: 1.12rem;
  line-height: 1.5;
  color: var(--ivory);
}

.page-about .principles__text {
  margin: 0;
  font-size: 0.93rem;
  line-height: 1.9;
  color: rgba(246, 241, 230, 0.76);
}

/* ---------- 会员档位 ---------- */
.page-about .tier-hint {
  display: block;
  margin: 0 0 0.6rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  color: var(--indigo-500);
}

.page-about .tier-scroll {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  border: 1px solid var(--hairline);
  background: var(--paper);
}

.page-about .tier-table {
  width: 100%;
  min-width: 680px;
  border-collapse: collapse;
  font-size: 0.92rem;
}

.page-about .tier-table th,
.page-about .tier-table td {
  padding: 14px 16px;
  text-align: left;
  vertical-align: top;
  line-height: 1.75;
  border-bottom: 1px solid var(--hairline);
}

.page-about .tier-table thead th {
  background: var(--indigo-700);
  color: var(--ivory);
  font-weight: 500;
  letter-spacing: 0.04em;
  white-space: nowrap;
}

.page-about .tier-table thead th:first-child {
  background: var(--indigo-900);
  position: sticky;
  left: 0;
  z-index: 2;
}

.page-about .tier-table tbody th {
  position: sticky;
  left: 0;
  z-index: 1;
  background: var(--ivory);
  font-weight: 600;
  color: var(--indigo-900);
  white-space: nowrap;
  border-right: 1px solid var(--hairline);
}

.page-about .tier-table tbody td {
  color: var(--graphite);
  background: var(--paper);
}

.page-about .tier-table tbody tr:hover td {
  background: rgba(198, 161, 91, 0.08);
}

.page-about .tier-table tbody tr:last-child th,
.page-about .tier-table tbody tr:last-child td {
  border-bottom: 0;
}

/* ---------- 团队 ---------- */
.page-about .team-layout {
  display: grid;
  gap: clamp(26px, 4vw, 48px);
}

.page-about .team-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: clamp(16px, 2.4vw, 24px);
}

.page-about .team-item {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 14px;
  padding-top: 16px;
  border-top: 1px solid var(--hairline);
}

.page-about .team-item__no {
  padding-top: 0.35rem;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.1em;
  color: var(--gold);
}

.page-about .team-item__title {
  margin: 0 0 0.35rem;
  font-family: var(--font-display);
  font-size: 1.04rem;
  line-height: 1.5;
  color: var(--indigo-900);
}

.page-about .team-item p {
  margin: 0;
  font-size: 0.94rem;
  line-height: 1.85;
  color: var(--graphite);
}

.page-about .team-figure {
  margin: 0;
  border: 1px solid var(--hairline);
  background: var(--indigo-900);
}

.page-about .team-figure img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* ---------- 地区与时段 ---------- */
.page-about .service-grid {
  display: grid;
  gap: clamp(28px, 4vw, 48px);
}

.page-about .fact-list {
  margin: 0;
}

.page-about .fact-list__row {
  display: grid;
  grid-template-columns: 82px minmax(0, 1fr);
  gap: 14px;
  padding: 14px 0;
  border-bottom: 1px solid var(--hairline);
}

.page-about .fact-list dt {
  padding-top: 0.25rem;
  font-family: var(--font-mono);
  font-size: 0.73rem;
  letter-spacing: 0.1em;
  color: var(--indigo-500);
}

.page-about .fact-list dd {
  margin: 0;
  font-size: 0.95rem;
  line-height: 1.85;
  color: var(--graphite);
}

.page-about .service-steps h3 {
  margin: 0 0 1rem;
  font-family: var(--font-display);
  font-size: 1.1rem;
  line-height: 1.5;
  color: var(--indigo-900);
}

.page-about .steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 18px;
}

.page-about .steps__item {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 14px;
}

.page-about .steps__no {
  display: grid;
  place-items: center;
  width: 2rem;
  height: 2rem;
  background: var(--indigo-700);
  color: var(--gold-light);
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.06em;
}

.page-about .steps__title {
  margin: 0 0 0.3rem;
  font-size: 0.98rem;
  font-weight: 600;
  color: var(--indigo-900);
}

.page-about .steps__text {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.85;
  color: var(--graphite);
}

/* ---------- 公开信息 ---------- */
.page-about .info-list {
  display: grid;
  gap: 0;
  margin: 0 0 clamp(20px, 3vw, 28px);
}

.page-about .info-list__row {
  display: grid;
  grid-template-columns: 96px minmax(0, 1fr);
  gap: 14px;
  padding: 13px 0;
  border-bottom: 1px solid rgba(198, 161, 91, 0.22);
}

.page-about .info-list dt {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  color: var(--gold);
}

.page-about .info-list dd {
  margin: 0;
  font-size: 0.94rem;
  line-height: 1.75;
  color: rgba(246, 241, 230, 0.86);
  word-break: break-word;
}

.page-about .info-note {
  margin: 0;
  font-size: 0.88rem;
  line-height: 1.8;
  color: rgba(246, 241, 230, 0.66);
}

.page-about .info-note a {
  color: var(--gold-light);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-about .info-note a:hover {
  color: var(--gold);
}

/* ---------- 末段引导 ---------- */
.page-about .about-next {
  background: var(--indigo-700);
  color: var(--ivory);
  padding: clamp(30px, 5vw, 56px) 0;
}

.page-about .about-next__title {
  margin: 0 0 1rem;
  font-family: var(--font-display);
  font-size: clamp(1.12rem, 2.2vw, 1.4rem);
  line-height: 1.5;
  color: var(--ivory);
}

.page-about .about-next__links {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0;
}

.page-about .about-next__links a {
  display: block;
  padding: 14px 0;
  border-top: 1px solid rgba(198, 161, 91, 0.35);
  font-size: 0.95rem;
  line-height: 1.7;
  color: var(--ivory);
  text-decoration: none;
  transition: color 180ms ease, border-color 180ms ease;
}

.page-about .about-next__links a:hover {
  color: var(--gold-light);
  border-top-color: var(--gold);
}

/* ---------- 断点 ---------- */
@media (min-width: 760px) {
  .page-about .about-index__list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .tier-hint {
    display: none;
  }

  .page-about .info-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: clamp(24px, 4vw, 48px);
  }

  .page-about .about-next__links {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: clamp(16px, 3vw, 32px);
  }
}

@media (min-width: 860px) {
  .page-about .service-grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    align-items: start;
  }

  .page-about .principles {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .principles__item {
    padding: 6px clamp(18px, 2.4vw, 30px) 8px;
    border-left: 1px solid rgba(198, 161, 91, 0.35);
  }

  .page-about .principles__item:first-child {
    border-left: 0;
    padding-left: 0;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, 0.88fr);
    align-items: end;
  }

  .page-about .timeline__item {
    padding-left: clamp(0px, 1.6vw, 18px);
  }

  .page-about .timeline__item:nth-child(even) {
    margin-left: clamp(24px, 7vw, 132px);
  }
}

@media (min-width: 1080px) {
  .page-about .about-index__list {
    grid-template-columns: repeat(6, minmax(0, 1fr));
  }

  .page-about .team-layout {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 0.85fr);
    align-items: start;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about * {
    transition-duration: 0.01ms !important;
  }
}